TruckTireGuide.com Semi Truck Tire Reference

Glossary

Service description

Last reviewed: 2026-05-20

The part of the sidewall marking that states load index, speed symbol, load range, and sometimes single or dual service information separate from the size string. It is the shorthand that connects the tire to its approved capacity and speed use. On a commercial tire, the size alone does not prove that the tire is acceptable for a steer, drive, or trailer position.

Read the complete service description, not just the size. Two tires of the same size can carry different load indexes, load ranges, or speed symbols. When a road call or counter quote mentions only "295/75R22.5," ask for the full sidewall service description before approving the tire.

Real-World Use

A buyer comparing two 295/75R22.5 tires from different suppliers checks the full service description and finds different load ranges. The cheaper tire fits the rim, but its service description points to a lower capacity table, so it is rejected for the loaded axle.

Reference Sources

Sources used for context and verification of regulatory thresholds, inspection criteria, and compliance references on this page.

What to Pair It With

Read this term with the full tire sidewall, vehicle rating information, manufacturer documentation, and the actual condition of the tire.

This site is for general information only. It does not replace professional tire service, DOT compliance advice, tire manufacturer instructions, vehicle manufacturer recommendations, or fleet policy.